A micro-macro scale approach for thermal effects in ferroelectrics

被引：8
|
作者：
El Khatib, Omar [1 ]
Kozinov, Sergii [1 ]
Kuna, Meinhard [1 ]
机构：
[1] TU Bergakad Freiberg, Inst Mech & Fluid Dynam, Freiberg, Germany
来源：
CONTINUUM MECHANICS AND THERMODYNAMICS | 2019年 / 31卷 / 05期
关键词：
Ferroelectrics; Thermal effects; Self-heating; Heat generation; Cyclic electric loading; ELECTRO-MECHANICAL BEHAVIOR; CONSTITUTIVE MODEL; POLYCRYSTALS; SIMULATION;
D O I：
10.1007/s00161-019-00760-8
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The influence of thermal fields on the electromechanical behavior of ferroelectric ceramics under cyclic electric loading is presented. To predict the temperature effect, a 3D micromechanical model for tetragonal domain switching is extended by including thermal effects. Numerical simulations were done through the finite element program Abaqus with the help of a user-defined element. Besides external heat sources, a change in temperature is considered by internal heat generated due to domain switching. Material properties are assumed to be linearly dependent on the temperature. The temperature influence on the behavior of ferroelectrics is shown by means of the strain and polarization hysteresis loops. The model shows a good qualitative agreement with the experimental results available in the literature.
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页码：1439 / 1452
页数：14
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